Buffing-machine.



PATENTED NOV. 26, 1907.

J. E. LEAVITT.

BUFFING MACHINE.

APPLICATION FILED mix. s. 1905.

2 SHEBTSSHEET 1 In verzior. E Leavit Mf- No. 871,942. PATENTED NOV. 26, 1907. J. E. LBAVITT.

BUPFING MACHINE.

APPLICATION FILED rm. a. 1905.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE,

JOHN LEA VITT, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO -MANUFAGTURERS MACHINE COMPANY, OF MONTOLAIR, NEW JERSEY, A CORPORATION OF NEW JERSEY.

BUFFING-MACHINE.

Specification pf Letters Patent.

Patented NOV. 26, 1907.

Application fil d February 3. 1905. Serial'No. 243,936.

citizen of the United States, residing at Bos ton, in the county of Suffolk, Commonwealth of Massachusetts, have invented an Improvement in Buffing-Machines, of which the following description, in connectionwith the accompanying drawings, is a specification, like letters on the drawings representing like parts.

My invention relates to builing machines and particularly to those of the Naumkeag or vertical spindle type used for buffing or finishingthe tread surfaces of boot and shoe soles. I

' One of the aims of my invention is to provide a buffing pad which shall combine the permanence, and stability of the felt pad with the greater resilience, life and adaptability of the pneumatic pad, while eliminating the objectionable features of each which objections are well known to those skilled in the art.

One embodiment of my invention for fulfilling this aim com rises a casing containing a filler of sponge ruliber or other material or "construction that "presents a plurality of pneumatic cells that require no continuous inflation when in use, yet furnish all the life and resilience of any pneumatic pad My invention also aims to provide improvements in the general structure and arrangement of the parts of the machine as a whole.

Y The nature of my invention will be more clearly apparent from a descri tion of one embodiment thereof, which has con selected for illustration and is shown in the accompanying drawings, and its scope will be pointed out in the ap ended claims.

In the drawings,- igure 1 illustrates my 7 improved machine in sideelevation partly in section; Fig. 2 is a detail sectional view on the line 2-2, Fig. 1 showing the bufling pad and its shaft; Fig. 3 is a detail sectional view on the line 3--3 Fig. '1, showing the fan suction member intended to dispose of the dust incident tothe buffing or cleaning operation; and Figs. 4', 5, (land 7 are views illustrating various steps in the manufacture of the improved pa In the particular embodiment of my invention which has been selected for illustration herein, the buffing pad 1 is mounted upon a vertical shaft 2, which is journaled in suit able hearings on a horizontal arm 3, mounted upon the column 4, of a tripod base 5.

The buffing pad in the form shown Fig. 2 comprises a casing 6, supported by a phaped filler of cellular material, such as sponge rubber. Over the exterior of the casing 6 is stretched a sheet of suitable abrading mate rial 8, the perimeter of which, together with the inturned lip of the casing 6, are firmly clamped upon a holder 9, b means of a clam ing member 10, mounte upon the hub 11 of said'holder. The exterior of the hub 11 is threaded, as. shown in Fig. 2, to receive a threaded nut 12, which may be turned down upon the clamping member 10, to press the latter firmly upon and to hold the pad lip and abradent cover 8.

Suitable means may be provided to lift the clamping member 10, from the holder Qto facilitate release of the abradent covering or the pad and to hold the clamping member elevated While a pad casing and its abradent covering are being adjusted thereon. For this purpose in the construction here shown,

the hub of the holder 9 is drilled centrally to resent a chamber 13, which receives a thimhle 14, supported by a spring 17 and carrying laterall extending pins or lugs 15, which protru e through slots in said hub and underlie the clam ing member 10, serving to raise the latter om clamping position upon the unscrewing of the nut 12. A plug 16 screwed into the open end of the chamber 13, serves as an adjustable support for the spring 17. The plug 16, as shown in Fig. 2, is preferably screwed some distance into the chamber 13, to leave an air chamber auxiliary to the.padfor increasing and maintaining the resihence'of said pad. The hub 11 of the holder 9 is provided with a tapering spindle 18, adapted to be inserted in and to frictionally engage a correspondingly tapered socket in the lower end end 19 of the actuating shaft 2. The upper end of this tapered socket terminates in a transverse slot 20, which receives the upper flattened end 21 of the spindle 18, to prevent rotation of the spindle in its socket. The socket 20, moreover, being open ended, furnishes a convenient opening for the insertion of a suitable tool above the spindle 18 whereby, when necessary the latter may be forced downwardly and released, from its socket.

evince venient inethod of ejecting the by unscrewing the nut 12, until,

t g pulley of the horizontal arm 3, down to aoout the main driving pulley 25, con neatly located upon the base of the mameans are also provided for conray from the buffer tool the dust to the buffing operation, which s may be of anydesired construction.

e shown it comprises a suitably arction due 26, which may be cast as column 4, and communicates at d with suitably arranged-pas- 7 see ig. 3) situated upon either side column and opening at 28 into the of fan casing containing a suction his fan is mounted upon a shaft ed in the colum'n l, and is proiia-i a suitable pulley 31, to which in the drivin wheel 25.

' er to and to the rigidity of the horitool carrying arm 3 and to stiffen the suction 26, said arm at its front extremv be provided with the projecting web 0 4, extending to and secured in suitable or upon said. suction flue 26,as shown 1-. usual cleaning brush 35 is herein 's urnaled in an. arm 36 extending 'hom the column 4 beneath the which is here shown as shaped to suction chamber 37 communicatans of a passage 38 with the main "a of the machine. V

is possible to use to advantage the com nller when loosely inserted in its sheath or casing, it is found in practice that loosely confined, is apt to creep and become launched and uneven.

with absolute certainty under all conditions,

impossible after the sponge ru her has once )eoure, as by vulcanization, the cellular filler surface of the casing to thereafter alter its position relative to the casing. It is necessary, therefore, that the pad shall be initially presented to the cemented inner face of the in precisely the positionin which itis gainst the lower end of the shaft, it y it which passes over guide pulleys on is imparted by means of a belt 32 under some conditions of work the filler thus In order to avoid this and to provide a pad which shall operate 1 find it preferable to cement or otherwiseconie in contact with the cemented interior to remain. To insure such proper inital presentationof the filler to the casing or sheath to which it is applied, properly formed casing, such as that shown at 3? in Fig. i, havingla curved cover supporting or working face and a marginal inwardly projecting lip, is reversed or turned inside out upon a suitably shaped' form iofl ig. 5), whereupon. the exposed interior surface of the casing may be readily coated with uitalole cement, the surface of the casing, when of rubber, being first for the best results, buiied remove the glazed surface. The sponge rubber.

filler may be placed. upon a suitable support and the form {l0 with the casir 39 reversed upon it brought down accurately upon the filler and the edges of the'latter pressed. in any suitable manner upwardly against the cemented surface of said casing, said edges being made to-coincide accurately with the crease 42 of the casing formed by the re versal of the-rim 43 thereof. 4 ess or method of manipulation the filler will be secured to and throughout the worlring area. of the casing whereby creeping of the filler within the casing will be effectually prevented. v

-While I have herein described and shown a ad formed of a se arate casing and cellular iii er, it-i s within t e scope of my invention to form the pad in a single piece with a sponge-hire or cellular interior body portion integral with a continuous solid facing porthis pro-o tion, the feasibility of such a construction.

being obvious to those conversant with the art of manufacture of sponge rubber.

Owing to the cellular structure oi the filler the pad while possessing the advantages of the pneumatic construction, does not become"deflated upon holder, nor upon cracking or perforation of the casing of said pad, andiurthermore, by

makirn the filler of somewhat lar er normal .volume than that or"- the casing, the resilience of the pad will be materially increased,

owing to the resulting compression under which the filler will be held within the casing;

it is apparent that my invention as here illustrated does not contemplate or require a tubular spindle nor an inlet for inflation or distention of the walls of the casing charm ber, nor is the abradent covering held in place byany expansive action or distention of the pad. On the contrary, the pad carrying spindle is preferably solid. or nontubular, and whatever air may be contained. within the pad casing, whether in the sponge rubber cells or in any chamber cominunieating with the sponge rubber, is confined like the air in a pneumatic wheel tire. or in the buffing-pads, such, for instance, as shown in the patent to Croolrer No. 472,287, April 5, 1892.

I have herein. shown but one embodiment of my invention, the same having been s eremoval from its l and scope of my invention.

'iary air chamber created by the space in oi the cellular filler; and by reason of the changes may be made in the construction arises lected for illustrative purposes only. Many i and relative arrangement of parts and in the character of the materials used, and my invention otherwise may be variously embodied, all without departing from the spirit From the construction thus presented one of the many modifications the invention may assume, it will be noted that the cellular or sponge-like filler sustains the peripheral portions of the buffing element projecting beyond the periphery of the holder 9 in such manner that upon the presentation of work thereto the butting pad is rendered self-sustaining as to general shape, and the portions is made effectively operative without injurious distortion, even though the work be pressed. with energy against the peripl'ieral portions, a condition not attainable in the ordinary pneumatic pad, as will be readily understood by those skilled in the art. liilorcover, it will be noted that while the cellular condition of the liller presents a multiplicity of air cells or chambers, the closed or auxilchamber 13 below the plug 16, a'llords a pneumatic action additional to the elastic action union between the cellular iiller and the iii-- closing sheath or cover all liability of the objectionable creeping and bunchingoi' the tiller 1S avoided,-a consideration of great im portance in tools of this character, as will be at once appreciated by those skilled in the art. The filler formed as a mass previously shaped to the conditions of use, renders a proper position of the tiller with respect to its sheath or cover readily possible without distortion of the tiller [miss in placing and securing it to'the working area of the sheath or cover.

Claim l. A butting pad comprising a pad-shaped mass of'l'illing material and a casing enveloping said mass, the said mass having portionsunited to the inner surface of said casing throughout the working area of the pad and having other portions free from the casing.

2. As a new article oi manufacture a bulling pad comprising a pad-shaped mass of resilient filling material, and a resilient casing therefor, the inner surface of said casing being united with the adjacent surface of the pad shaped mass and retaining said mass in proper relation to the casing, the non-adjacent surface of the pad shaped mass being free from the casing.

3. A Naumlreag buffing pad for operating upon boots and shoes, comprising a casing having a working face and an inwardly projecting lip extendin about theperimeter of the casing, and a filler shaped to fit between the inner surface of the working face of the casing and said lip, said filler being formed of previously shaped sponge rubber.

4. A buffing pad comprising a casing and a filler formed of spon e rubber, the imier surface of the casing sponge rubber filler and an abrading material supportei'l by the casing.

5. A builing pad comprising a substantially disk-shaped head, a casing secured to said head, an abrading material sup or'ted by said casing a sponge rubber filler 'ormed as a pad shaped mass and interposed between the said head and casing, the eripheral portions oi the casing and. the ii le-r extending beyond the peripheral portions of the head.

(i. As an article of manufacture, a builin cad comprising a substantially disk-shape read, a casing of resilient material secured thereto, a resilient cellular liller interposed between the head and the casin the peripheral portions of the casing and filler extendi beyond the peripheral portions of the hea ili said tiller being united to the inner surface of the casing substantially throughout the working area of the pad and having other pol tions free from said casing.

7. A bufling pad, a support therefor, a clamping member, a thimble 14 having projecting portions 15 engaging the clamping member, and a spring acting to mov! the thimblc and clan'ipmg member from clamping position wh n the latter is released.

A boiling pad comprising, in combinabeing cemented t0 the.

tion, a head .l, a clamping member 10 and its clamping means to secure the pad to the head, a thimble lei, liming portions engaging the clamping member, and a spring 17 for lifting the clamping member from the head when released by its clamping i'neans.

J. ft boiling machine pad of substantially disk-like form, comprising a casing 39having a curved working face and an inwardly projecting lip, and a pad-shaped mass of sponge rubber previously formed to fit with in said casing between the inner surface of its curved working face and said projecting lip, said sponge rubber filler being secured to the inner surface of thecasing.

In testimony whereof, I have signed my name to this specification, in the presence oftwo subscribing witnesses.

JOHN LEAVITT. Witnesses:

RALPH. C. POWELL, ANnm E. CnEsLnY. 

